drm/arcpgu: fix device node leak

This function gets a device_node reference via
of_graph_get_remote_port_parent() and stores it in encoder_node, but never
puts that reference. Add it.

There used to be a of_node_put(encoder_node) but it has been removed by
mistake during a rework in commit 3ea66a794fdc ("drm/arc: Inline
arcpgu_drm_hdmi_init").

Fixes: 3ea66a794fdc ("drm/arc: Inline arcpgu_drm_hdmi_init")
Cc: stable@vger.kernel.org
Reviewed-by: Louis Chauvet <louis.chauvet@bootlin.com>
Link: https://patch.msgid.link/20260402-drm-arcgpu-fix-device-node-leak-v2-1-d773cf754ae5@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

diff --git a/drivers/gpu/drm/tiny/arcpgu.c b/drivers/gpu/drm/tiny/arcpgu.c
index 50588849748213f0bf36343a34899d0a7ff5e3e2..c93d61ac0bb75522979edabc9005479f385102b0 100644 (file)
--- a/drivers/gpu/drm/tiny/arcpgu.c
+++ b/drivers/gpu/drm/tiny/arcpgu.c
@@ -250,7 +250,8 @@ DEFINE_DRM_GEM_DMA_FOPS(arcpgu_drm_ops);
 static int arcpgu_load(struct arcpgu_drm_private *arcpgu)
 {
        struct platform_device *pdev = to_platform_device(arcpgu->drm.dev);
-       struct device_node *encoder_node = NULL, *endpoint_node = NULL;
+       struct device_node *encoder_node __free(device_node) = NULL;
+       struct device_node *endpoint_node = NULL;
        struct drm_connector *connector = NULL;
        struct drm_device *drm = &arcpgu->drm;
        int ret;